CN212179270U - Novel refrigeration device - Google Patents
Novel refrigeration device Download PDFInfo
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- CN212179270U CN212179270U CN202021032062.8U CN202021032062U CN212179270U CN 212179270 U CN212179270 U CN 212179270U CN 202021032062 U CN202021032062 U CN 202021032062U CN 212179270 U CN212179270 U CN 212179270U
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- refrigerant
- heat exchanger
- compressor
- evaporator
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- 238000005057 refrigeration Methods 0.000 title claims description 22
- 239000003507 refrigerant Substances 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 30
- 239000000110 cooling liquid Substances 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 22
- 238000009423 ventilation Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004297 night vision Effects 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model provides a novel refrigerating plant, including refrigerating unit, refrigerating unit includes heat exchanger, compressor, evaporimeter and expansion valve, the refrigerant export of heat exchanger and the refrigerant import intercommunication of expansion valve, the refrigerant export of expansion valve and the refrigerant import intercommunication of evaporimeter, the refrigerant export of evaporimeter and the refrigerant import intercommunication of compressor, the refrigerant export of compressor and the refrigerant import intercommunication of heat exchanger, the coolant liquid import and the feed liquor pipe intercommunication of heat exchanger, the coolant liquid export and the fluid-discharge tube intercommunication of heat exchanger. The utility model has the advantages that: the refrigerant and air are directly subjected to heat exchange, so that the heat exchange efficiency is improved; the finned evaporator is adopted, so that the cross section area is increased, and the heat exchange efficiency is improved; the scroll compressor is adopted, the closed design is adopted, the reliability is high, the maintenance is not needed (oil change is not needed) for a long time, and the cost performance is high.
Description
Technical Field
The utility model relates to a refrigeration especially indicates a novel refrigeration device.
Background
As shown in figure 1, in the refrigeration process of the existing tunnel refrigeration system, firstly, external circulating water flows through a flowmeter B1 from a position A and is divided into two paths, wherein one path of external circulating water enters a cold water tank B3, the other path of external circulating water cools a screw compressor B2, secondly, the cold water system circulates, a cold water pump B5 pumps chilled water to an original evaporator B4 from the cold water tank, heat is taken away by heat exchange in a tunnel, the chilled water enters a refrigeration unit to be cooled, and the chilled water returns to the cold water tank after cooling.
As shown in figure 2, in the conventional tunnel ventilation system, air enters the air duct extending device B7 from the outside of the tunnel during ventilation, the air outside the tunnel passes through the original evaporator B4, the air outside the tunnel exchanges heat with chilled water of the original evaporator, and the cooled air is secondarily relayed by a secondary fan B6 and pumped to a personnel operation position in the front of the shield. The chilled water exchanges heat with the refrigerant of the screw compressor B2, the refrigerant exchanges heat with the external circulating water, and finally the heat is taken out of the hole by the external circulating water.
The ventilation refrigerating system in the tunnel has the following problems:
1. the cross section of the original evaporator is small, heat exchange cannot be fully carried out, and the heat exchange efficiency is low;
2. the original evaporator adopts chilled water to exchange heat with tunnel air, the chilled water has small temperature difference, and the heat exchange efficiency is limited;
3. the original compressor unit adopts a screw compressor, the compressor flow can only work at 50%, 75% and 100%, 25% can only be used for starting, the total energy consumption is high, the flow regulation gear is rough, and the screw compressor has low cost performance and needs to be maintained regularly.
SUMMERY OF THE UTILITY MODEL
The utility model provides a novel refrigeration device has solved the problem that current tunnel ventilation refrigerating system heat exchange efficiency is low, with high costs.
The technical scheme of the utility model is realized like this:
a novel refrigerating device comprises a refrigerating unit, wherein the refrigerating unit comprises a heat exchanger, a compressor, an evaporator and an expansion valve, a refrigerant outlet of the heat exchanger is communicated with a refrigerant inlet of the expansion valve, a refrigerant outlet of the expansion valve is communicated with a refrigerant inlet of the evaporator, a refrigerant outlet of the evaporator is communicated with a refrigerant inlet of the compressor, a refrigerant outlet of the compressor is communicated with a refrigerant inlet of the heat exchanger, a cooling liquid inlet of the heat exchanger is communicated with a liquid inlet pipe, and a cooling liquid outlet of the heat exchanger is communicated with a liquid discharge pipe; the compressors are in a split arrangement of at least two.
The liquid inlet pipe is an outer liquid inlet pipe of the tunnel, and the liquid discharge pipe is an outer liquid discharge pipe of the tunnel.
The liquid inlet pipe is provided with a filter I and a descaling instrument.
The filter I is a Y-shaped filter.
The descaler is an electronic descaler.
The refrigerating unit is provided with at least two groups which are connected in parallel.
The refrigerating units are provided with two groups.
The liquid inlet pipe and the liquid outlet pipe are divided into branch pipes with the same number as that of the refrigerating units, and each branch pipe is correspondingly communicated with each group of refrigerating units.
The heat exchanger is a shell-and-tube heat exchanger.
And a high-voltage switch is arranged on a pipeline between the heat exchanger and the compressor.
The compressor is a scroll compressor.
The scroll compressors are at least two in parallel, and an oil level balance pipe is communicated between the scroll compressors in parallel.
The scroll compressor is provided with three scroll compressors connected in parallel.
And a low-pressure switch and a needle valve are arranged on a pipeline between the compressor and the evaporator.
The temperature sensing bulb of the expansion valve is positioned at the refrigerant outlet of the evaporator, and the capillary tube of the expansion valve is communicated with the refrigerant outlet pipeline of the evaporator.
The evaporator is a finned evaporator.
And a temperature probe is arranged at the evaporator.
And a solenoid valve, a night vision mirror and a filter II are arranged on a pipeline between the heat exchanger and the expansion valve.
The filter II is a drying filter.
The utility model has the advantages that: the refrigerant and air are directly subjected to heat exchange, so that the heat exchange efficiency is improved; the finned evaporator is adopted, so that the cross section area is increased, and the heat exchange efficiency is improved; the scroll compressor is adopted, the closed design is adopted, the reliability is high, the maintenance is not needed (oil change is not needed) for a long time, and the cost performance is high; the compressor adopts split type to arrange, realizes the function of a compressor through a plurality of compressors, optimizes spatial layout, and the installation is used more in a flexible way.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a conventional tunnel refrigeration system.
Fig. 2 is a schematic view of a conventional tunnel ventilation system.
Fig. 3 is a schematic view of the present invention.
In the figure: 1-filter I, 2-descaler, 3-heat exchanger, 4-high pressure switch, 5-compressor, 6-low pressure switch, 7-needle valve, 8-thermal bulb, 9-evaporator, 10-temperature probe, 11-expansion valve, 12-electromagnetic valve, 13-night vision mirror, 14-filter II, 15-oil level balance pipe; b1-a flowmeter, B2-a screw compressor, B3-a cold water tank, B4-an original evaporator, B5-a cold water pump, B6-a secondary fan and B7-an air pipe extending device.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
As shown in fig. 3, a novel refrigeration device comprises a refrigeration unit, and the refrigeration unit comprises a heat exchanger 3, a compressor 5, an evaporator 9 and an expansion valve 11. The refrigerant outlet of the heat exchanger 3 is communicated with the refrigerant inlet of the expansion valve 11, the refrigerant outlet of the expansion valve 11 is communicated with the refrigerant inlet of the evaporator 9, the refrigerant outlet of the evaporator 9 is communicated with the refrigerant inlet of the compressor 5, and the refrigerant outlet of the compressor 5 is communicated with the refrigerant inlet of the heat exchanger 3. The cooling liquid inlet of the heat exchanger 3 is communicated with the liquid inlet pipe, and the cooling liquid outlet of the heat exchanger 3 is communicated with the liquid discharge pipe. The liquid inlet pipe is an outer liquid inlet pipe of the tunnel, and the liquid discharge pipe is an outer liquid discharge pipe of the tunnel.
The refrigerating unit is provided with two groups which are connected in parallel, the liquid inlet pipe and the liquid discharge pipe are divided into two branch pipes with the same number as that of the refrigerating unit, and one branch pipe is correspondingly communicated with one refrigerating unit.
The heat exchanger 3 is a shell-and-tube heat exchanger, a solenoid valve 12, a night vision mirror 13 and a filter II14 are arranged on a pipeline between the heat exchanger 3 and the expansion valve 11, and the filter II14 is a dry filter.
The bulb 8 of the expansion valve 11 is located at the refrigerant outlet of the evaporator 9, and the capillary tube of the expansion valve 11 is communicated with the refrigerant outlet pipeline of the evaporator 9.
The evaporator 9 is a finned evaporator, and a temperature probe 10 is arranged at the evaporator 9. A low-pressure switch 6 and a needle valve 7 are arranged on a pipeline between the compressor 5 and the evaporator 9.
The compressors 5 are at least two split type arrangements, the function of one compressor is realized through a plurality of compressors, the space layout is optimized, the field installation and use are more flexible, the compressors are preferably scroll compressors, the scroll compressors are provided with three parallel compressors, and an oil level balance pipe 15 is communicated between the parallel scroll compressors. A high-voltage switch 4 is arranged on a pipeline between the heat exchanger 3 and the compressor 5.
The liquid inlet pipe is provided with a filter I1 and a scale remover 2, the filter I1 is a Y-shaped filter, and the scale remover 2 is an electronic scale remover.
During ventilation and refrigeration, cooling inflow water outside the tunnel enters a Y-shaped filter, is subjected to primary filtration and then enters an electronic descaling instrument, so that a large amount of suspension (aragonite crystals) is generated under the action of electromagnetic waves by the cooling inflow water outside the tunnel, then heat exchange is carried out through a shell-and-tube heat exchanger, a liquid refrigerant is vaporized into low-temperature and low-pressure steam after absorbing the heat of ventilation outside the tunnel in an evaporator, the low-temperature and low-pressure steam is sucked by a scroll compressor and compressed into high-pressure and high-temperature steam, and then the high-pressure and high-temperature steam is discharged into the shell-and-tube heat exchanger, releases heat to circulating water outside the tunnel in the shell-and-tube heat exchanger, is condensed into high-pressure liquid. When the exhaust pressure of the compressor reaches the alarm pressure of the high-voltage switch, the refrigerating unit is stopped and an alarm is output to the outside.
The capacity reduction principle is as follows:
when the working environment temperature of the refrigerating machine exceeds 45 ℃, the initial liquid temperature is higher than 40 ℃, the working environment temperature exceeds the environment temperature required by the refrigerating unit and is less than or equal to 45 ℃, the liquid temperature is less than or equal to 40 ℃, and the exhaust temperature of the compressor is increased after the compressor runs for a period of time (about 5-10 minutes) because of overhigh load, and finally the high-voltage switch gives an alarm. At the moment, the system stops the compressor, and the refrigerant in the pipeline and the compressor are cooled through the shell-and-tube heat exchanger. And when the shutdown delay of the compressor exceeds 3min and the temperature of the temperature probe is lower than 55 ℃, restarting the compressor and continuously cooling the refrigerant.
The compressors are connected by adopting parallel pipelines for avoiding dry running, and the oil level in the compressors is balanced by an oil level balancing pipe. Two groups of refrigerating units are connected in parallel to finish air inlet and heat exchange outside the tunnel. And starting the compressors connected in parallel step by step according to the change of the temperature probe of the air outlet.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A novel refrigerating device comprises a refrigerating unit and is characterized in that: the refrigerating unit comprises a heat exchanger (3), a compressor (5), an evaporator (9) and an expansion valve (11), wherein a refrigerant outlet of the heat exchanger (3) is communicated with a refrigerant inlet of the expansion valve (11), a refrigerant outlet of the expansion valve (11) is communicated with a refrigerant inlet of the evaporator (9), a refrigerant outlet of the evaporator (9) is communicated with a refrigerant inlet of the compressor (5), a refrigerant outlet of the compressor (5) is communicated with a refrigerant inlet of the heat exchanger (3), a cooling liquid inlet of the heat exchanger (3) is communicated with a liquid inlet pipe, and a cooling liquid outlet of the heat exchanger (3) is communicated with a liquid discharge pipe; the compressors (5) are of a split arrangement of at least two.
2. The novel refrigeration unit of claim 1, wherein: the liquid inlet pipe is an outer liquid inlet pipe of the tunnel, and the liquid discharge pipe is an outer liquid discharge pipe of the tunnel.
3. The novel refrigeration unit of claim 1, wherein: the refrigerating unit is provided with at least two groups which are connected in parallel.
4. A novel refrigeration unit according to claim 1 or 3, characterized in that: the liquid inlet pipe and the liquid outlet pipe are divided into branch pipes with the same number as that of the refrigerating units, and each branch pipe is correspondingly communicated with each group of refrigerating units.
5. The novel refrigeration unit of claim 1, wherein: the heat exchanger (3) is a shell-and-tube heat exchanger.
6. The novel refrigeration unit of claim 1, 3 or 5, wherein: the compressor (5) is a scroll compressor.
7. The novel refrigeration unit of claim 6, wherein: the scroll compressors are at least two in parallel, and an oil level balance pipe (15) is communicated between the scroll compressors in parallel.
8. The novel refrigeration unit of claim 1, wherein: the temperature sensing bulb (8) of the expansion valve (11) is positioned at a refrigerant outlet of the evaporator (9), and a capillary tube of the expansion valve (11) is communicated with a refrigerant outlet pipeline of the evaporator (9).
9. The novel refrigeration unit of claim 1, wherein: the evaporator (9) is a finned evaporator.
10. A novel refrigeration unit according to claim 1 or 9, characterized in that: a temperature probe (10) is arranged at the evaporator (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021032062.8U CN212179270U (en) | 2020-06-08 | 2020-06-08 | Novel refrigeration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021032062.8U CN212179270U (en) | 2020-06-08 | 2020-06-08 | Novel refrigeration device |
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| Publication Number | Publication Date |
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| CN212179270U true CN212179270U (en) | 2020-12-18 |
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| CN202021032062.8U Active CN212179270U (en) | 2020-06-08 | 2020-06-08 | Novel refrigeration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114687782A (en) * | 2020-12-25 | 2022-07-01 | 中铁工程装备集团有限公司 | Tunnel refrigerating system |
-
2020
- 2020-06-08 CN CN202021032062.8U patent/CN212179270U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114687782A (en) * | 2020-12-25 | 2022-07-01 | 中铁工程装备集团有限公司 | Tunnel refrigerating system |
| CN114687782B (en) * | 2020-12-25 | 2025-03-28 | 中铁工程装备集团有限公司 | A tunnel refrigeration system |
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